Custom CVD ZnS IR Window Supplier
LWIR Optical Windows | Multispectral ZnS Domes | IR Protection Optics
Felix Glass supplies standard FLIR grade and HIP multispectral CVD ZnS infrared windows, hemispherical domes and blanks for LWIR thermal imaging, common-aperture multi-sensor and rugged EO/IR systems.
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CVD ZnS Window / Dome | FLIR Grade & HIP Multispectral | LWIR Optics
OEM Manufacturing | AR / DLC Coating | Custom Specifications
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Material & Grade Overview
CVD Zinc Sulfide (ZnS) is the workhorse LWIR material for 8–14μm thermal imaging. Standard FLIR grade ZnS delivers excellent long-wave infrared transmission. HIP hot isostatic pressing converts it to multispectral ZnS, extending usable range into visible and near-infrared for common-aperture sensors. Material substrate does not equal final performance grade. Please specify grade, wavelength band and coating requirements to avoid improper selection.
Key Specifications & Custom Options
| Substrate Material |
CVD ZnS (FLIR Grade / HIP Multispectral Grade) |
| Shape |
Flat window, disc, hemispherical dome, plano blank, custom profile |
| Size Range |
Dia 5mm‑300mm, custom thickness, dome radius & edge geometry |
| Surface Quality |
20‑10 /40‑20 scratch‑dig, customized per customer drawing |
| Working Wavelength Band |
FLIR Grade: 8–14μm; Multispectral HIP ZnS: 0.4–14μm |
| Coating Options |
Uncoated, LWIR AR coating, DLC hard coating, combined AR+DLC |
| Custom Machining |
Edge chamfer, counterbore, O‑ring groove, stepped flange, dome machining |
| Inspection |
Spectrophotometer, interferometer, visual defect inspection, material certificate available |
Manufacturing & Inspection Evidence
Interferometer Inspection
Precision Polishing
Finished Component Detail
All CVD ZnS windows and domes go through interferometer and spectral performance inspection before delivery.
Typical Application
- 8–14μm LWIR thermal imaging cameras and surveillance systems
- UAV, gimbal, airborne EO/IR common-aperture multi-sensor payloads
- Vehicle thermal sight, marine and rugged outdoor sensor protection
- Multispectral optical systems combining visible, NIR and LWIR channels
Coating Selection Guide
LWIR AR coating reduces surface reflection and maximizes long-wave infrared transmission. DLC coating improves scratch resistance and environmental durability for field deployment. Combined AR+DLC coating is recommended for harsh airborne, marine and outdoor environments. Learn more about infrared optical coating technology.
Order & Quotation Requirements (Valid RFQ Checklist)
To generate an accurate quotation within 24 hours, please prepare below information:
- 2D/3D engineering drawing (PDF / STEP / IGES preferred)
- Material grade: Standard FLIR ZnS or HIP Multispectral ZnS
- Working wavelength, dimension, thickness tolerance, groove / flange requirements
- Required coating specification
- Quantity: prototype sample / pilot batch / mass‑production volume
Send Drawing For Quote
FAQ Snippets
What is the difference between FLIR grade ZnS and multispectral HIP ZnS?
Standard FLIR grade ZnS is optimized only for 8–14μm LWIR. HIP hot isostatic pressing removes scattering centers, enabling visible+NIR+LWIR multispectral transmission for common-aperture sensors.
Can CVD ZnS dome be used underwater or subsea?
ZnS is softer and less water-resistant than sapphire. Sapphire is preferred for deep subsea; ZnS suits dry-air or low-humidity airborne thermal payloads.
Is there fixed MOQ for CVD ZnS windows and domes?
No strict fixed MOQ. We support prototype, small‑batch and large‑volume manufacturing for custom ZnS optics.
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